<!DOCTYPE html>
<html lang="en">
<style>
    .title {

    }
    .describe {
        display: block;
        width: 50%;
        word-wrap: break-word;
    }
    .item_button {
        float: right;
    }
</style>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div style="width: 200px;position: relative;background: tan">
    <span class="title">Title</span>
    <div style="float: right;height: 100%">
        <button class="item_button" onclick="">点击按钮</button>
        <ul class="ul_sel">
            <li>呵呵呵1</li>
            <li>呵呵呵2</li>
        </ul>
    </div>
    <span class="describe">谈了世界</span>
</div>
</body>
<script>

</script>
</html>
